Make a comparison between stream ciphers and block ciphers with example.
|Subject||Computer and Network Security|
|NU Year||Set: 1.(d) Marks: 4 Year: 2014|
|BASIS FOR COMPARISON||BLOCK CIPHER||STREAM CIPHER|
||Converts the plain text by taking its block at a time.||Converts the text by taking one byte of the plain text at a time.|
|No of bits used||64 Bits or more||8 Bits|
|Confusion and Diffusion
||Uses both confusion and diffusion||Relies on confusion only|
|Algorithm modes used
||ECB (Electronic Code Book)
CBC (Cipher Block Chaining)
|CFB (Cipher Feedback)
OFB (Output Feedback)
|Reversibility||Reversing encrypted text is hard.
||It uses XOR for the encryption which can be easily reversed to the plain text.|
Login to post your comment.